IMovie when export is completed speed looks quick. HELP!!

I have a Sony HDR-HC&. When I download the movie to IMovie speed of horses looks normal (as in the same as real life) I then edit the imported video and export the final version.

When I play that video the horses look like they have been speeded up.

I need to be able to have them moving at the same speed as when the movie was recorded.

Anyone know what is happening and how I prevent the tempo from increasing by exporting the movie so other people can see it? This does not happen if I export to full version however that version is useless for sending to other people and will not even fit on a DVD to send in the mail.

wouldn't know why it's going so fast, or unnormal, but I would export it at much quality and then just import to iDVD. iDVD makes sure it will fit. (when it's not longer then 1,5 hour or something like that).

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.